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https://www.readbyqxmd.com/read/28943257/immuno-detection-of-cleaved-snap-25-from-differentiated-mouse-embryonic-stem-cells-provides-a-sensitive-assay-for-determination-of-botulinum-a-toxin-and-antitoxin-potency
#1
G Yadirgi, P Stickings, S Rajagopal, Y Liu, D Sesardic
Botulinum toxin type A is a causative agent of human botulism. Due to high toxicity and ease of production it is classified by the Centres for Disease Control and Prevention as a category A bioterrorism agent. The same serotype, BoNT/A, is also the most widely used in pharmaceutical preparations for treatment of a diverse range of neuromuscular disorders. Traditionally, animals are used to confirm the presence and activity of toxin and to establish neutralizing capabilities of countermeasures in toxin neutralization tests...
September 21, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28934201/forensic-genetics-and-genomics-much-more-than-just-a-human-affair
#2
REVIEW
Miguel Arenas, Filipe Pereira, Manuela Oliveira, Nadia Pinto, Alexandra M Lopes, Veronica Gomes, Angel Carracedo, Antonio Amorim
While traditional forensic genetics has been oriented towards using human DNA in criminal investigation and civil court cases, it currently presents a much wider application range, including not only legal situations sensu stricto but also and, increasingly often, to preemptively avoid judicial processes. Despite some difficulties, current forensic genetics is progressively incorporating the analysis of nonhuman genetic material to a greater extent. The analysis of this material-including other animal species, plants, or microorganisms-is now broadly used, providing ancillary evidence in criminalistics in cases such as animal attacks, trafficking of species, bioterrorism and biocrimes, and identification of fraudulent food composition, among many others...
September 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28930520/molecular-evolution-of-hemagglutinin-gene-of-influenza-a-virus
#3
Antara De
In the history of human civilization, influenza is the second most catastrophic killer disease for mankind with plague ranking first in the medieval times. The 1918-1919 'Spanish flu' killed 20-50 million people worldwide. According to a report from WHO, there have been four pandemics, several epidemics and recurrent seasonal outbreaks of influenza in different parts of the world. The virus is a potential bioterrorism threat with biological 'Chernobyl-like disaster' that occurred in Soviet Russia in 1977. Here, the author reviews the biology of the surface exposed hemagglutinin of the influenza virus, a gene under constant positive selection pressure to evade host immunity and vaccination...
January 1, 2018: Frontiers in Bioscience (Scholar Edition)
https://www.readbyqxmd.com/read/28904964/plague-a-millenary-infectious-disease-reemerging-in-the-xxi-century
#4
REVIEW
A J Dos Santos Grácio, Maria Amélia A Grácio
Plague, in the Middle Ages known as Black Death, continues to occur at permanent foci in many countries, in Africa, Asia, South America, and even the USA. During the last years outbreaks were reported from at least 3 geographical areas, in all cases after tens of years without reported cases. The recent human plague outbreaks in Libya and Algeria suggest that climatic and other environmental changes in Northern Africa may be favourable for Y. pestis epidemiologic cycle. If so, other Northern Africa countries with plague foci also may be at risk for outbreaks in the near future...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28893198/lessons-from-a-decade-of-individual-based-models-for-infectious-disease-transmission-a-systematic-review-2006-2015
#5
Lander Willem, Frederik Verelst, Joke Bilcke, Niel Hens, Philippe Beutels
BACKGROUND: Individual-based models (IBMs) are useful to simulate events subject to stochasticity and/or heterogeneity, and have become well established to model the potential (re)emergence of pathogens (e.g., pandemic influenza, bioterrorism). Individual heterogeneity at the host and pathogen level is increasingly documented to influence transmission of endemic diseases and it is well understood that the final stages of elimination strategies for vaccine-preventable childhood diseases (e...
September 11, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28891987/total-body-irradiation-mitigates-inflammation-and-extends-the-therapeutic-time-window-for-anti-ricin-antibody-treatment-against-pulmonary-ricinosis-in-mice
#6
Yoav Gal, Anita Sapoznikov, Reut Falach, Sharon Ehrlich, Moshe Aftalion, Chanoch Kronman, Tamar Sabo
Ricin, a highly toxic plant-derived toxin, is considered a potential weapon in biowarfare and bioterrorism due to its pronounced toxicity, high availability, and ease of preparation. Pulmonary exposure to ricin results in the generation of an acute edematous inflammation followed by respiratory insufficiency and death. Massive neutrophil recruitment to the lungs may contribute significantly to ricin-mediated morbidity. In this study, total body irradiation (TBI) served as a non-pharmacological tool to decrease the potential neutrophil-induced lung injury...
September 11, 2017: Toxins
https://www.readbyqxmd.com/read/28856066/estimation-of-time-period-for-effective-human-inhalational-anthrax-treatment-including-antitoxin-therapy
#7
Lewis Rubinson, Alfred Corey, Dan Hanfling
INTRODUCTION: Infrequent natural human inhalational anthrax cases coupled with high bioterrorism risk have brought about use of animal models to serve as the basis for approval of novel treatments. For inhalational anthrax, protective antigen (PA) drives much of the mortality, and raxibacumab, an anti-PA monoclonal antibody, has been approved for therapeutic use using the Animal Rule. Given the paucity of human inhalational anthrax clinical data including PA kinetics, the post-exposure period for effective treatment of human disease remains unknown...
July 28, 2017: PLoS Currents
https://www.readbyqxmd.com/read/28809473/aggregation-induced-emission-materials-with-different-electric-charges-as-an-artificial-tongue-design-construction-and-assembly-with-various-pathogenic-bacteria-for-effective-bacterial-imaging-and-discrimination
#8
Guang-Jian Liu, Sheng-Nan Tian, Cui-Yun Li, Guo-Wen Xing, Lei Zhou
Imaging-based total bacterial count and type identification of bacteria play crucial roles in clinical diagnostics, public health, biological and medical science, and environmental protection. Herein, we designed and synthesized a series of tetraphenylethenes (TPEs) functionalized with one or two aldehyde, carboxylic acid, and quaternary ammonium groups, which were successfully used as fluorescent materials for rapid and efficient staining of eight kinds of representative bacterial species, including pathogenic bacteria Vibrio cholera, Klebsiella pneumoniae, and Listeria monocytogenes and potential bioterrorism agent Yersinia pestis...
August 30, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28775316/efficient-functional-neutralization-of-lethal-peptide-toxins-in-vivo-by-oligonucleotides
#9
Tarek Mohamed Abd El-Aziz, Corinne Ravelet, Jordi Molgo, Emmanuelle Fiore, Simon Pale, Muriel Amar, Sawsan Al-Khoury, Jérôme Dejeu, Mahmoud Fadl, Michel Ronjat, Germain Sotoing Taiwe, Denis Servent, Eric Peyrin, Michel De Waard
Medical means to save the life of human patients affected by drug abuse, envenomation or critical poisoning are currently limited. While the compounds at risks are most often well identified, particularly for bioterrorism, chemical intervention to counteract the toxic effects of the ingested/injected compound(s) is restricted to the use of antibodies. Herein, we illustrate that DNA aptamers, targeted to block the pharmacophore of a poisonous compound, represent a fast-acting and reliable method of neutralization in vivo that possesses efficient and long-lasting life-saving properties...
August 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28760903/tetrazole-based-trans-translation-inhibitors-kill-bacillus-anthracis-spores-to-protect-host-cells
#10
John N Alumasa, Tyler D P Goralski, Kenneth C Keiler
Bacillus anthracis, the causative agent of anthrax, remains a significant threat to humans, including potential use in bioterrorism and biowarfare. The capacity to engineer strains with increased pathogenicity coupled with the ease of disseminating lethal doses of B. anthracis spores makes it necessary to identify chemical agents that target and kill spores. Here, we demonstrate that a tetrazole-based trans-translation inhibitor, KKL-55, is bactericidal against vegetative cells of B. anthracis in culture. Using a fluorescent analog, we show that this class of compounds co-localizes with developing endospores and bind purified spores in vitro KKL-55 was effective against spores at concentrations close to its MIC for vegetative cells...
July 31, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28747367/rapid-detection-of-bacillus-anthracis-blood-stream-infections-using-a-novel-assay-in-the-genexpert-system
#11
Padmapriya P Banada, Srinidhi Deshpande, Riccardo Russo, Eric Singleton, Darshini Shah, Bhavana Patel, Michele Burday, Ranie Koshy, Qing Wang, Martin Jones, Alexander Gall, Sergey Lokhov, Robert Kwiatkowski, David Persing, Nancy Connell, David Alland
BACKGROUND.Bacillus anthracis is a tier1 select agent with the potential to quickly cause severe disease. Rapid identification of this pathogen may accelerate treatment and reduce mortality in the event of a bioterrorism attack. We developed a rapid and sensitive assay to detect B. anthracis bacteremia using a system that is suitable for point of care testing.METHODS. A filter-based cartridge that included both sample processing and PCR amplification functions was loaded with all reagents needed for sample processing and multiplex nested PCR...
July 26, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28740731/comparing-new-generation-candidate-vaccines-against-human-orthopoxvirus-infections
#12
R A Maksyutov, S N Yakubitskyi, I V Kolosova, S N Shchelkunov
The lack of immunity to the variola virus in the population, increasingly more frequent cases of human orthopoxvirus infection, and increased risk of the use of the variola virus (VARV) as a bioterrorism agent call for the development of modern, safe vaccines against orthopoxvirus infections. We previously developed a polyvalent DNA vaccine based on five VARV antigens and an attenuated variant of the vaccinia virus (VACV) with targeted deletion of six genes (VACΔ6). Independent experiments demonstrated that triple immunization with a DNA vaccine and double immunization with VACΔ6 provide protection to mice against a lethal dose (10 LD50) of the ectromelia virus (ECTV), which is highly pathogenic for mice...
April 2017: Acta Naturae
https://www.readbyqxmd.com/read/28694806/a-bivalent-anthrax-plague-vaccine-that-can-protect-against-two-tier-1-bioterror-pathogens-bacillus-anthracis-and-yersinia-pestis
#13
Pan Tao, Marthandan Mahalingam, Jingen Zhu, Mahtab Moayeri, Michelle L Kirtley, Eric C Fitts, Jourdan A Andersson, William S Lawrence, Stephen H Leppla, Ashok K Chopra, Venigalla B Rao
Bioterrorism remains as one of the biggest challenges to global security and public health. Since the deadly anthrax attacks of 2001 in the United States, Bacillus anthracis and Yersinia pestis, the causative agents of anthrax and plague, respectively, gained notoriety and were listed by the CDC as Tier-1 biothreat agents. Currently, there is no Food and Drug Administration-approved vaccine against either of these threats for mass vaccination to protect general public, let alone a bivalent vaccine. Here, we report the development of a single recombinant vaccine, a triple antigen consisting of all three target antigens, F1 and V from Y...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28692391/harnessing-syndromic-surveillance-emergency-department-data-to-monitor-health-impacts-during-the-2015-special-olympics-world-games
#14
Emily Kajita, Monica Z Luarca, Han Wu, Bessie Hwang, Laurene Mascola
INTRODUCTION: Mass gatherings that attract a large international presence may cause or amplify point-source outbreaks of emerging infectious disease. The Los Angeles County Department of Public Health customized its syndromic surveillance system to detect increased syndrome-specific utilization of emergency departments (EDs) and other medical encounters coincident to the 2015 Special Olympics World Games. MATERIALS AND METHODS: We queried live databases containing data on ED visits, California Poison Control System calls, and Los Angeles County coroner-investigated deaths for increases in daily counts from July 19 to August 6, 2015...
July 2017: Public Health Reports
https://www.readbyqxmd.com/read/28692386/the-evolution-of-biosense-lessons-learned-and-future-directions
#15
Deborah W Gould, David Walker, Paula W Yoon
The BioSense program was launched in 2003 with the aim of establishing a nationwide integrated public health surveillance system for early detection and assessment of potential bioterrorism-related illness. The program has matured over the years from an initial Centers for Disease Control and Prevention-centric program to one focused on building syndromic surveillance capacity at the state and local level. The uses of syndromic surveillance have also evolved from an early focus on alerts for bioterrorism-related illness to situational awareness and response, to various hazardous events and disease outbreaks...
July 2017: Public Health Reports
https://www.readbyqxmd.com/read/28692384/advancing-the-use-of-emergency-department-syndromic-surveillance-data-new-york-city-2012-2016
#16
Ramona Lall, Jasmine Abdelnabi, Stephanie Ngai, Hilary B Parton, Kelly Saunders, Jessica Sell, Amanda Wahnich, Don Weiss, Robert W Mathes
INTRODUCTION: The use of syndromic surveillance has expanded from its initial purpose of bioterrorism detection. We present 6 use cases from New York City that demonstrate the value of syndromic surveillance for public health response and decision making across a broad range of health outcomes: synthetic cannabinoid drug use, heat-related illness, suspected meningococcal disease, medical needs after severe weather, asthma exacerbation after a building collapse, and Ebola-like illness in travelers returning from West Africa...
July 2017: Public Health Reports
https://www.readbyqxmd.com/read/28673681/the-association-between-self-perceived-proficiency-of-personal-protective-equipment-and-objective-performance-an-observational-study-during-a-bioterrorism-simulation-drill
#17
Itay Fogel, Osant David, Chaya H Balik, Arik Eisenkraft, Lion Poles, Omri Shental, Michael Kassirer, Tal Brosh-Nissimov
BACKGROUND: The recent Ebola virus disease outbreak emphasized the potential misuse of personal protective equipment (PPE) by health care workers (HCWs) during such an event. We aimed to compare self-perceived proficiency of PPE use and objective performance, and identify predictors of low compliance and PPE misuse. METHODS: An observational study combined with subjective questionnaires were carried out during a bioterror simulation drill. Forty-two observers evaluated performance under PPE...
June 30, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28666604/a-human-time-dose-response-model-for-q-fever
#18
Charles W Heppell, Joseph R Egan, Ian Hall
The causative agent of Q fever, Coxiella burnetii, has the potential to be developed for use in biological warfare and it is classified as a bioterrorism threat agent by the Centers for Disease Control and Prevention (CDC) and as a category B select agent by the National Institute of Allergy and Infectious Diseases (NIAID). In this paper we focus on the in-host properties that arise when an individual inhales a dose of C. burnetii and establish a human time-dose response model. We also propagate uncertainty throughout the model allowing us to robustly estimate key properties including the infectious dose and incubation period...
June 15, 2017: Epidemics
https://www.readbyqxmd.com/read/28662754/animal-models-of-ebolavirus-infection
#19
Marisa C St Claire, Dan R Ragland, Laura Bollinger, Peter B Jahrling
Ebola virus is a highly pathogenic member of the family Filoviridae that causes a severe hemorrhagic disease in humans and NHP. The 2013-2016 West African outbreak has increased interest in the development and refinement of animal models of Ebola virus disease. These models are used to test countermeasures and vaccines, gain scientific insights into the mechanisms of disease progression and transmission, and study key correlates of immunology. Ebola virus is classified as a BSL4 pathogen and Category A agent, for which the United States government requires preparedness in case of bioterrorism...
June 1, 2017: Comparative Medicine
https://www.readbyqxmd.com/read/28652232/characterization-of-a-francisella-tularensis-caenorhabditis-elegans-pathosystem-for-the-evaluation-of-therapeutic-compounds
#20
Elamparithi Jayamani, Nagendran Tharmalingam, Rajmohan Rajamuthiah, Jeffrey J Coleman, Wooseong Kim, Ikechukwu Okoli, Ana M Hernandez, Kiho Lee, Gerard J Nau, Frederick M Ausubel, Eleftherios Mylonakis
Francisella tularensis is a highly infectious Gram-negative intracellular pathogen that causes tularemia. Because of its potential as a bioterrorism agent, there is a need for new therapeutic agents. We therefore developed a whole-animal Caenorhabditis elegans-F. tularensis pathosystem for high-throughput screening to identify and characterize potential therapeutic compounds. We found that the C. elegans p38 mitogen-activate protein (MAP) kinase cascade is involved in the immune response to F. tularensis, and we developed a robust F...
September 2017: Antimicrobial Agents and Chemotherapy
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